Even though the manual currently says that the first parameter has to be "One of DateTimeZone class constants", you may actually combine these constants:
<?php
$a = DateTimeZone::listIdentifiers(DateTimeZone::AFRICA); //gives africa time zones
$b = DateTimeZone::listIdentifiers(DateTimeZone::AMERICA); //gives american time zones
$c = DateTimeZone::listIdentifiers(DateTimeZone::AFRICA | DateTimeZone::AMERICA); //gives both african and american time zones
?>
Be sure to use |, not ||.
DateTimeZone::listIdentifiers
timezone_identifiers_list
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
DateTimeZone::listIdentifiers -- timezone_identifiers_list — Retourne un tableau numérique contenant tous les identifiants de fuseaux horaires définis
Description
Style orienté objet
public static DateTimeZone::listIdentifiers(int
$timezoneGroup = DateTimeZone::ALL, string|null $countryCode = null): arrayStyle procédural
timezone_identifiers_list(int
$timezoneGroup = DateTimeZone::ALL, string|null $countryCode = null): arrayListe de paramètres
-
timezoneGroup -
Une (ou une combinaison) des constantes de classe DateTimeZone.
-
countryCode -
Un code de pays en deux lettres, compatible ISO 3166-1.
Note: Cette option n'est disponible que lorsque le paramètre
timezoneGroupprend la valeur deDateTimeZone::PER_COUNTRY.
Valeurs de retour
Retourne le tableau des identificateurs des fuseaux horaires.
Historique
| Version | Description |
|---|---|
| 8.0.0 |
Antérieur à cette version, false était retourné en cas d'échec.
|
| 7.1.0 |
countryCode est désormais nullable.
|
Exemples
Exemple #1 Exemple avec timezone_identifiers_list()
<?php
$timezone_identifiers = DateTimeZone::listIdentifiers();
for ($i=0; $i < 5; $i++) {
echo "$timezone_identifiers[$i]\n";
}
?>
Résultat de l'exemple ci-dessus est similaire à :
Africa/Abidjan Africa/Accra Africa/Addis_Ababa Africa/Algiers Africa/Asmara
add a note
User Contributed Notes 3 notes
kalle at example dot com ¶
8 years ago
repohelga at example dot com ¶
4 years ago
Beware that the ISO 3166-1 country code passed to second parameter $country has to be in capital letters (eg. 'US', 'DE', ...).
Passing the country code in lower case like 'us' or 'de' will not return the failure-value false but just an empty array.
PHP Guru ¶
3 years ago
In tests that I have done, not all time zones are returned by this function. For example the following aliases Asia/Katmandu and Asia/Calcutta are not returned, but these time zones are supported in tests that I have done such as the following:
<?php
echo date_default_timezone_set('Asia/Calcutta');
?>
result:
Fri, 19 Jun 2020 03:26:52 +0530
UTC+05:30 is the correct time zone for Calcutta.
Asia/Katmandu and Asia/Calcutta are aliases for Asia/Kathmandu and Asia/Kolkata respectively (which can be found in the list)
Hopefully this helps some people because without these time zones appearing in the list one might not know that they are supported or even exist.
